Audio with Marantz SR6005

I have a Marantz SR6005 that is at the center of my home theater system. I have HDMI connections to my DirecTV HR20, Sony BluRay, and AppleTV. I had an older 50" Panasonic rear projection tv. All was happy with the world with this setup. I utilized my receiver for all audio and had my TV speakers set at zero.

I replaced the TV with a 60" Panasonic GT30 on Saturday. Now I am having issues with the audio not being processed by the receiver. I noticed it the first time with the BluRay and have had it happen since with the other connections.

I am suspecting that it has something to do with the new TV but I have no clue what. Does anyone have any suggestions on how to go about even diagnosing the issues?

One thing I think it might be is that my HDMI cables are all older. I suspect with my older TV it wasn't an issue since it didn't use any newer protocols. But that is just a huge guess.

Any help would be great - I am sure I will get gruff from my spouse when stuff doesn't work right.

You didn't say what exactly your 'audio problems' were. So taking a guess that you're not getting any audio or the wrong audio for what you select, the first thing you should do is: Go into the GT30's menu. Select the last icon (looks like a wrench). Find the selection "VIERA Link settings" and select it. Now make sure to turn "VIERA Link" to off. See if that fixed your issue.